Maternal GBS colonization rate was higher than previously reported, and varied with different risk populations. EOGBSD reduced after universal screening.

Objective To compare the angle of progression (AoP) measured by transperineal ultrasonography before indicating an instrumental delivery or cesarean delivery. Methods A prospective observational study was conducted among women with singleton term pregnancies with prolonged second stage of labor at Kwong Wah Hospital, Hong Kong, China, between May 16, 2011, and May 25, 2016. Transabdominal and transperineal ultrasonography were performed to determine fetal head position and AoP, respectively, both at rest and during uterine contraction with pushing. Mode of delivery was decided after vaginal examination without relying on ultrasonography. Results Of 143 women, 116 underwent successful instrumental delivery and 27 underwent cesarean delivery. Median AoP was 153.0° in the instrumental group versus 139.0° in the cesarean group at rest (P<0.001), and 182.5° in the instrumental group versus 156.5° in the cesarean group during contraction (P<0.001). The best predictive cutoff AoP for successful instrumental delivery was 138.7° at rest (sensitivity 86.2%, specificity 51.9%) and 160.9° during contraction (sensitivity 87.1%, specificity 74.1%). No between‐group differences in AoP were found for ease of vacuum extraction at rest (P=0.457) or during contraction with pushing (P=0.095). Conclusion The AoP predicted approximately 80% of successful instrumental deliveries performed for prolonged second stage of labor.

No abstract

No abstract

Oral communication abstractsregression performed, to identify relation of AOP predicting CD to cervical dilatation. Results: 119 women were included in the study. 90(76%) delivered vaginally while 29 had CD (24%). Women undergoing CD had significantly narrower AOP at rest (93 versus 104, P=0.001) and under maternal pushing (102 versus 118, P<0.0001).ROC curve analysis for AOP as a predictor of CD showed AUC of 68% (95 CI 59-77%) for static and 73% (95CI 64-81%) for dynamic assessment.On univariate logistic regression analysis both static AoP (OR 1.04 (95CI 1.01-1.07, P =0.008)) dynamic AoP (1.05 (95CI 1.02-1.08), P =0.0003) were independent predictors of CD from cervical dilatation (OR 1 (95% CI 0.97-1.03), P= 0.8).Conclusions: AoP at rest and on maternal pushing can predict Caesarean delivery in the first stage independently from cervical dilatation.Objectives: Fetal and neonatal head circumference are strongly correlated with labour and delivery outcomes. Pre-and postnatal HC measures correlate strongly, with a mean 1-cm difference stemming from differences in approach. Fetal HC≥35cm however has a weaker association with delivery mode than large neonatal HC. We sought to investigate the variations between fetal and neonatal HC and estimated fetal weight (EFW) and birth weight (BW).